According to the Daily Mail, the man was subsequently released without charge as the (not identified) substance wasn't Satan's Mother after all. Although, oddly, the body of the article contradicts itself, saying he's still in custody.

German man arrested for 'trying to carry "Satan's mother" explosive TATP onto a plane in Sweden' is released without charge

German national in his 20s arrested at Landvetter airport, Sweden, on Thursday Routine bag check detected presence of explosives, police initially said Local media reported he was carrying explosive TATP, used in terror attacks On Friday he was released without charge after the 'explosives' had been tested<snip>The man, who was denied bail and remains in custody, has denied the allegations.